numA,numB=[],[]
n,k = map(int,input().split())
if n<=10000 and  k<=100:
    for item in range(1,n+1):
        numA.append(item)  if item % k ==0 else numB.append(item)
    print(f"{sum(numA)/len(numA):.1f} {sum(numB)/len(numB):.1f}")